Arrest made in triple homicide at Pinetree Country Club

Police said earlier this week they believed Siller was killed “because he witnessed an active crime taking place.”

“It does not appear he (Siller) was targeted,” but instead was killed because he “happened upon a crime in progress involving the unknown suspect and the two deceased males,” the Cobb County Police Department said in a news release.

Golf pro Gene Siller killed and 2 others found dead at Georgia golf course

Police said they were called to a report of a person shot on Saturday afternoon and found Siller — the club’s director of golf — shot in the head near the green of the course’s 10th hole.

A truck was on the green, and officers found the bodies of the two other men in the truck’s bed — both of whom also had been shot, police said.

Someone had driven to the green in the truck — a white Ram 3500 pickup — and shot Siller when Siller arrived to see what was going on, a member of the club told CNN affiliate WXIA. The shooter then fled, WXIA reported.

One of the slain men was Paul Pierson, the registered owner of the Ram 3500, police said. The name of the other slain man was not released.

Pierson and the other slain man “appear to have no relation to the location at all,” Cobb County police said Tuesday.

The Georgia State Golf Association expressed its condolences for Siller’s death. “All of us at the GSGA are deeply saddened by the tragic events that occurred earlier today at Pinetree CC. Our thoughts and prayers are with Gene Siller’s family and friends,” the association tweeted on July 3.

Siller, 46, leaves behind a wife and two children, ages 6 and 7, according to the Pinetree Country Club.

This is a developing story and will be updated.